See ME326446 for a hotfix applicable to Microsoft Exchange Server 5.5.

This event occurred with Event: 4116, and 4117 Source: MSExchangeIMC. See ME192583.

This error message in Exchange System Manager (ESM) appears when trying to view public folders and can be caused by one of many things. It is a generic MAPI error code in Exchange, but it is not necessarily caused by a MAPI error.

As per ME306518, the 80004005 error message can be summarized as "I couldn't get at your data for some reason."